[U-Boot] MTD partitions not mounted by the kernel

[Albert ARIBAUD <albert.aribaud@free.fr>]

Le 10/02/2011 15:45, Alexandre Gambier a ?crit :
> Hello,
>
> I use U-Boot 1.3.1 with a NOR and a NAND Flash.
> I created the following partitions with U-Boot.

U-Boot 1.3.1 is rather old., BTW

> device nor0<NOR>, # parts = 4
>    #: name                        size            offset          mask_flags
>    0: U-Boot              0x00080000      0x00000000      0
>    1: Environment         0x00020000      0x00080000      0
>    2: Kernel              0x00400000      0x000a0000      0
>    3: FreeNOR             0x00360000      0x004a0000      0
>
> device nand0<NAND>, # parts = 2
>    #: name                        size            offset          mask_flags
>    0: FS                  0x02000000      0x00000000      0
>    1: FreeNAND            0x06000000      0x02000000      0
>
> active partition: nor0,0 - (U-Boot) 0x00080000 @ 0x00000000
>
> defaults:
> mtdids  : nor0=NOR,nand0=NAND
> mtdparts:
> mtdparts=NOR:512k(U-Boot),128k(Environment),4M(Kernel),-(FreeNOR);NAND:32M(FS),-(FreeNAND)
>
> I checked the support for MTD devices and for the MTD command line in
> the kernel config.
>
> here is my bootargs environment variable :
> bootargs=console=ttyAS0,115200 mem=128M root=/dev/nfs
> nfsroot=192.168.1.60:/tftpboot/stlinux/skyworth/rootfs
> ip=192.168.1.111:192.168.1.60:192.168.1.1:255.255.255.0
> mtdparts=NOR:512k(U-Boot),128k(Environment),4M(Kernel),-(FreeNOR);NAND:32M(FS),-(FreeNAND)
>
> The problem is that once my system is running the MTD devices in /dev
> are not created and the file /proc/mtd is empty.
>
> Is my command line wrong ?

The creation of the entries in /dev is not caused by the sole presence 
of mtdpart= on the command line. Either you must create these entries 
manually, or you have to have a dynamic /dev manager, for instance udev, 
create them for you with the help of adequate configuration files.

Note that this has nothing to do with U-Boot, though.

> Thanks in advance.
> Alex

Amicalement,
-- 
Albert.